JPH0827562B2 - Multi-color image forming device - Google Patents
Multi-color image forming deviceInfo
- Publication number
- JPH0827562B2 JPH0827562B2 JP60188584A JP18858485A JPH0827562B2 JP H0827562 B2 JPH0827562 B2 JP H0827562B2 JP 60188584 A JP60188584 A JP 60188584A JP 18858485 A JP18858485 A JP 18858485A JP H0827562 B2 JPH0827562 B2 JP H0827562B2
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- developer
- developing
- color
- developing sleeve
- black
- Prior art date
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Description
【発明の詳細な説明】 技術分野 本発明は複数の色の現像剤を切換えて使用できるマル
チカラー画像形成装置の現像装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device of a multi-color image forming apparatus capable of switching and using developers of a plurality of colors.
従来技術 複写機等の画像形成装置においては通常の黒色現像剤
を用いて黒色コピーを得るのに対し、他の色の現像剤を
収容した現像装置を準備し、希望のときに現像装置を入
替えて他の色によるコピーを得るようにしたものが最近
市販されている。この種の画像形成装置は現行の色画像
をその色で再現するものではなく、原稿の画像を黒と黒
以外の他の色を切換え選択し、一色の画像として再現す
るものであり、以下この種の画像形成装置を通常の画像
形成装置及び多色（又はカラー）画像形成装置と区別す
るためマルチカラー画像形成装置と称する。2. Description of the Related Art In an image forming apparatus such as a copying machine, a black copy is obtained using a normal black developer, whereas a developing device containing a developer of another color is prepared and the developing device is replaced when desired. Recently, it has been marketed to obtain a copy in another color. This type of image forming apparatus does not reproduce the current color image in that color, but reproduces as a single color image by switching and selecting the image of the document between black and other colors than black. This type of image forming apparatus is referred to as a multi-color image forming apparatus to distinguish it from a normal image forming apparatus and a multicolor (or color) image forming apparatus.
従来のマルチカラー画像形成装置では予め所望の色の
現像剤を収容した現像装置を黒色現像剤を収容した現像
装置の外に準備し、色替え毎に現像装置を取替えなけれ
ばならないので、色替えの作業に手間がかかり、構造的
にも高価なものになるという欠点があった。In a conventional multi-color image forming apparatus, a developing device containing a developer of a desired color is prepared outside the developing device containing a black developer in advance, and the developing device must be replaced for each color change. However, there is a drawback in that the work is troublesome and structurally expensive.
目的 本発明は従来の別個に現像装置を準備する必要があ
り、又交換する必要があるという問題点を解消し、構造
が簡単で色替作業が楽なマルチカラー画像形成装置を提
供することを目的としている。An object of the present invention is to provide a multi-color image forming apparatus having a simple structure and easy color changing operation, which solves the conventional problems of separately preparing and replacing the developing devices. Has an aim.
構成 本発明は静電潜像担持体に隣接して異なる色の現像剤
を収容した複数の現像ユニットを配置し、該現像ユニッ
トの１つが黒色現像剤を収容した黒色現像ユニット、他
の現像ユニットが複数の異なる色の現像剤を収容した複
数色現像ユニットとして構成されたマルチカラー画像形
成装置において、前記複数色現像ユニットが、異なる色
の現像剤を収容した複数の現像剤室と、前記静電潜像担
持体に対向配置された１つの現像スリーブと、前記現像
剤室の現像剤を該現像スリーブに補給し、かつ現像スリ
ーブ側に補給した現像剤を現像剤室に回収する補給・回
収手段とを有し、該補給・回収手段が現像剤室毎に設け
られていることを特徴とする。Structure According to the present invention, a plurality of developing units containing developers of different colors are arranged adjacent to the electrostatic latent image carrier, one of the developing units is a black developing unit containing a black developer, and another developing unit. In a multi-color image forming apparatus configured as a multi-color developing unit containing a plurality of different color developers, the multi-color developing unit includes a plurality of developer chambers containing different color developers, and One developing sleeve opposed to the latent electrostatic image bearing member, and the developer in the developer chamber is supplied to the developing sleeve, and the developer supplied to the developing sleeve side is collected in the developer chamber. Means and the replenishment / recovery means is provided for each developer chamber.
本発明の構成及び効果の詳細を図に示す実施例に基づ
いて説明する。Details of the configuration and effects of the present invention will be described based on an embodiment shown in the drawings.
第１図において静電潜像担持体１の移動路に沿って例
えば感光体ドラム１の周囲にそって複数色現像ユニット
としての第１現像ユニット10と黒色現像ユニットとして
の第２現像ユニット20とが配置されている。他に図示し
ていないが帯電器、イレースランプ等作像処理に必要な
手段が感光体１に沿って設けてある。In FIG. 1, a first developing unit 10 as a multi-color developing unit and a second developing unit 20 as a black developing unit are provided along the moving path of the electrostatic latent image carrier 1 along, for example, the periphery of the photosensitive drum 1. Are arranged. Although not shown, means such as a charger and an erase lamp necessary for the image forming process are provided along the photoreceptor 1.
第１現像ユニット10は青、セピア、赤等の有彩色現像
剤を収容し、第２現像ユニット20は黒色現像剤を収容す
る。この場合有彩色現像剤としては一成分系現像剤を用
い、黒色現像剤としては二成分系現像剤を用いる。The first developing unit 10 contains chromatic color developers such as blue, sepia, and red, and the second developing unit 20 contains black developer. In this case, a one-component developer is used as the chromatic color developer and a two-component developer is used as the black developer.
第１現像ユニット10と第２現像ユニット20は必要によ
ってはたがいに入れ替わった状態に配置することもでき
る。If necessary, the first developing unit 10 and the second developing unit 20 can be arranged so as to be interchanged with each other.
第１現像ユニット10は、現像容器11と、その現像容器
11の感光体ドラム１に対向する位置に配置されている現
像スリーブ12と、現像容器11内であって現像スリーブ12
と適宜の間隔をもって配置されている現像剤収納部13を
有している。現像スリーブ12は図の反時計方向へ回転で
き、又図示していないが、その内部に後述する現像剤を
搬送するために必要となる磁石を持っている。更にこの
現像スリーブ12には、感光体ドラム１の表面の電位に応
じて決定される現像バイアス電圧が印加されることがで
きる。The first developing unit 10 includes a developing container 11 and the developing container.
11 is a developing sleeve 12 arranged at a position facing the photosensitive drum 1, and the developing sleeve 12 in the developing container 11.
And a developer accommodating portion 13 arranged at an appropriate interval. The developing sleeve 12 can rotate in the counterclockwise direction in the figure, and has a magnet (not shown) which is necessary to convey a developer, which will be described later, inside the sleeve. Further, a developing bias voltage determined according to the potential of the surface of the photosensitive drum 1 can be applied to the developing sleeve 12.
現像剤収納部13は、複数（図では３個）の現像剤室15
B、15R、そして15Gを備えており、それらの各室内には
それぞれ黒色一成分現像剤16B、赤色一成分現像剤16R、
そして緑色一成分現像剤16Gが収納されている。黒色に
代えて他の色の現像剤を収納することもできる。又、各
現像剤室15B、15R、15Gは個々に現像剤の排出・回収を
する補給手段としての補給ローラ17を備えている。補給
ローラ17は反時計方向に回転できる。正、反何れの方向
に回転させてもよい。The developer storage unit 13 includes a plurality of (three in the figure) developer chambers 15.
B, 15R, and 15G are provided, and each of these chambers has a black one-component developer 16B, a red one-component developer 16R,
And 16G of green one-component developer is stored. Instead of black, developers of other colors can be stored. Further, each developer chamber 15B, 15R, 15G is provided with a replenishing roller 17 as a replenishing means for discharging and recovering the developer individually. The supply roller 17 can rotate counterclockwise. It may be rotated in either the forward or reverse direction.
図示の状態では緑色現像剤室15Gの補給ローラ17が現
像スリーブ12に対向しているが、この状態では該補給ロ
ーラ17が回転すれば、補給ローラ17の近傍にある緑色現
像剤16Gが機械的に補給ローラ17に追従して反時計方向
に移動し、その結果、現像剤室15Gから現像スリーブ12
の上へ落下される。すなわち、現像剤の排出が行われ
る。現像スリーブ12に対する現像剤収納部13の配置によ
っては補給ローラ17により強制的に排出するようにする
こともできる。補給ローラ17が反時計方向に回転して緑
色現像剤16Gが排出される時、補給ローラ17は予め現像
スリーブ12のバイアス電圧と逆極性の適宜の電圧が印加
されており（以下、この電圧を補給時電圧という）、よ
って排出される現像剤は、補給ローラ17に接触するよう
に現像剤収納部13の壁の一端部に設けてある導電ブラシ
又はその他導電性の弾性部材19を通過するときに所定の
電位に帯電する。In the illustrated state, the replenishing roller 17 of the green developer chamber 15G faces the developing sleeve 12, but in this state, when the replenishing roller 17 rotates, the green developer 16G in the vicinity of the replenishing roller 17 is mechanically operated. Moves counterclockwise following the replenishment roller 17, and as a result, from the developer chamber 15G to the developing sleeve 12
Be dropped on. That is, the developer is discharged. Depending on the arrangement of the developer accommodating portion 13 with respect to the developing sleeve 12, the supply roller 17 may forcibly discharge the developer. When the replenishment roller 17 rotates counterclockwise and the green developer 16G is discharged, the replenishment roller 17 is previously applied with an appropriate voltage having a polarity opposite to the bias voltage of the developing sleeve 12 (hereinafter, this voltage is When the developer is discharged, it passes through a conductive brush or other conductive elastic member 19 provided at one end of the wall of the developer accommodating portion 13 so as to contact the replenishing roller 17. Is charged to a predetermined potential.
上記の補給時電圧は緑色現像剤16Gを帯電させるため
のものであるので、その弾圧極性及び電圧値は、緑色現
像剤16Gの性質に応じて適宜に変更される。Since the above-mentioned replenishment voltage is for charging the green developer 16G, its elastic polarity and voltage value are appropriately changed according to the properties of the green developer 16G.
こうして帯電した緑色現像剤16Gは、現像スリーブ12
によって搬送されながら感光体ドラム１の表面に接触
し、その時に静電潜像に静電的に付着して該潜像を現像
する。現像に寄与しなかった現像剤は、新たに排出され
た現像剤と混ざりながら再度現像作業に供される。ある
いは、現像容器11に形成されている予備室内に保持され
る。The green developer 16G thus charged is the developing sleeve 12
While being conveyed by, the toner comes into contact with the surface of the photosensitive drum 1, and at that time, electrostatically adheres to the electrostatic latent image to develop the latent image. The developer that has not contributed to the development is supplied to the development work again while being mixed with the newly discharged developer. Alternatively, it is held in a preliminary chamber formed in the developing container 11.
オペレータが緑色複写に替えて他の色の複写、例えば
赤色複写を行なおうとする場合には、現像剤収納部13の
全体を中心軸のまわりに正時計方向に回転させ、赤色現
像剤室15Rの補給ローラ17を現像スリーブ12に対向する
位置迄移動させる。その後、前記の説明と同様の作用に
して赤色現像剤16Rを現像スリーブ12へ供給して現像作
業を行うのである。こうして緑色複写に替えての赤色複
写が行われるのであるが、緑色複写後、直ちに現像剤収
納部13を回転させるものとすれば、現像スリーブ12のま
わりには緑色現像剤が残ってしまうので、次いで新たに
赤色現像剤16Rを現像スリーブ12へ供給した時に緑色現
像剤16Gと赤色現像剤16Rが混じってしまいその結果、所
望する鮮明な赤色複写が得られない。よって、赤色現像
にあたっては、赤色現像剤16Rを現像スリーブ12へ供給
する前に現像スリーブ12のまわりから先の現像剤、即ち
緑色現像剤15Gを除去しなければならない。When the operator wants to make a copy of another color instead of the green copy, for example, a red copy, the entire developer accommodating portion 13 is rotated counterclockwise around the central axis, and the red developer chamber 15R is rotated. The supply roller 17 is moved to a position facing the developing sleeve 12. After that, the red developer 16R is supplied to the developing sleeve 12 in the same operation as described above to perform the developing operation. In this way, red copying is performed instead of green copying, but if the developer storage section 13 is rotated immediately after green copying, the green developer will remain around the developing sleeve 12, Next, when the red developer 16R is newly supplied to the developing sleeve 12, the green developer 16G and the red developer 16R are mixed, and as a result, a desired clear red copy cannot be obtained. Therefore, in red development, before the red developer 16R is supplied to the developing sleeve 12, the previous developer, that is, the green developer 15G, must be removed from around the developing sleeve 12.
そのために補給スリーブ17を停止して緑色複写作業の
終了後、画像露光を省略した１回の普通の複写プロセス
を実行して、緑のベタ画像を作成することにより、現像
スリーブ12のまわりに残留した緑色現像剤16Gを感光体
ドラム１上に付着しクリーニング除去する。補給ローラ
17に剤回収作業をも行なわせるように形成することもで
きる。すなわち、緑色複写作業が終わっても現像剤収納
部13は直ちには回転しないで、まず補給ローラ17を逆
転、すなわち正時計方向に回転する。そしてそれと同時
に、それまで補給ローラ17に印加されていた補給時電圧
を、現像スリーブ12のバイアス電圧と同極性であってバ
イアス電圧よりも大きい電圧（以下、回収時電圧とい
う）に切換える。Therefore, after the supply sleeve 17 is stopped and the green copying operation is completed, one normal copying process without image exposure is executed to create a green solid image, so that it remains around the developing sleeve 12. The green developer 16G is attached onto the photosensitive drum 1 and removed by cleaning. Supply roller
It is also possible to form 17 so as to also perform the agent collecting operation. That is, the developer storage unit 13 does not rotate immediately after the green copying operation is completed, but first the supply roller 17 is rotated in the reverse direction, that is, in the clockwise direction. At the same time, the replenishment voltage that has been applied to the replenishment roller 17 is switched to a voltage that has the same polarity as the bias voltage of the developing sleeve 12 and is larger than the bias voltage (hereinafter referred to as recovery voltage).
補給ローラ17に関して上記の如く回転方向及び印加電
圧を切り換えることにより、現像スリーブ12のまわりの
緑色現像剤は補給ローラ17に吸引され、そして緑色現像
剤室15G内へ回収される。現像剤回収時の補給ローラ17
の正時計回転によって緑色現像剤が室外へ排出されるの
を防ぐため、補給ローラ17に接触するように導電ブラシ
とは反対側の室壁にブレード18を取付けるようにするこ
ともできる。By changing the rotation direction and the applied voltage with respect to the replenishment roller 17, the green developer around the developing sleeve 12 is sucked by the replenishment roller 17 and collected in the green developer chamber 15G. Replenishing roller 17 for collecting developer
In order to prevent the green developer from being discharged to the outside of the room by the clockwise rotation of 1, the blade 18 may be attached to the chamber wall opposite to the conductive brush so as to contact the replenishing roller 17.
緑色現像剤16Gが回収し終わると、前述の通り現像剤
収納部13が回転して赤色現像室15Rの補給ローラ17が現
像スリーブ12に対向する位置まで運ばれ、その後赤色複
写作業が行われる。今度は現像スリーブ12のまわりに緑
色現像剤16Gが残っていないので、混色は発生しない。
以上の説明は、緑色複写と赤色複写との間の色替えの場
合であるが、他色間の色替えの場合も同様の作用であ
る。When the green developer 16G has been collected, the developer accommodating portion 13 rotates and the replenishment roller 17 of the red developing chamber 15R is conveyed to a position facing the developing sleeve 12 as described above, and then the red copying operation is performed. Since the green developer 16G does not remain around the developing sleeve 12 this time, color mixing does not occur.
The above description is for the case of color change between the green copy and the red copy, but the same effect is obtained for the color change between other colors.
本実施例では、１つの現像スリーブ12を備えた１つの
現像容器11内に、複数の現像剤室15B、15R、15Gを持つ
現像剤収納部13を回転可能に配置し、現像剤収納部13を
回転していずれかの現像室を選択することにしているの
で、複数の現像装置を必要とした従来装置に比べて大き
なスペースが不要である。又現像ユニットを交換する必
要がないので色変え作業が容易である。In this embodiment, a developer container 13 having a plurality of developer chambers 15B, 15R, 15G is rotatably arranged in one developer container 11 having one developing sleeve 12, and the developer container 13 is provided. Since any one of the developing chambers is rotated by rotating, the large space is not required as compared with the conventional device which requires a plurality of developing devices. Further, since it is not necessary to replace the developing unit, the color changing work is easy.
現像スリーブ12により運搬される現像剤は薄層化ブレ
ード14により現像剤の層の厚さを調整される。The developer carried by the developing sleeve 12 has a layer thickness of the developer adjusted by a thinning blade 14.
第２現像ユニット20は普通の二成分現像剤用現像装置
と同様に構成され、感光体ドラム１に所定の現像ギャッ
プを隔てて対向し、内部に図示しない磁石を有し、矢印
方向に回転可能な現像スリーブ21と、現像スリーブ21の
感光体ドラム１と反対側において現像容器22の底部に近
接して回転可能に設けられたパドルホイール23を設け、
該パドルホイール23の周囲の現像剤貯留スペース24に、
黒色トナーとキャリヤとから成る二成分現像剤25が充填
され、現像容器22にトナータンク26を接続して構成され
ている。トナータンク26の出口には周囲に軸方向に伸び
る複数本の溝を設けたトナー補給ローラ27が取付られて
いる。現像スリーブ21の周囲の容器壁の現像位置より上
流側には、現像スリーブ21により搬送される現像剤の層
厚規制用ドクター28が設けられており、その背後のパド
ルホイール23の上部には斜方向に配置されたフイン29
と、撹拌スクリュー30とより成る現像剤撹拌装置が設け
られている。感光体ドラム１の周囲が現像部へ入る位置
には、入口シール31が設けられている。現像時、現像ス
リーブ21及びパドルホイール23が同時に反時計方向に回
転すると、現像容器22内に貯留された現像剤25はパドル
ホイール23の翼によって現像スリーブ21上に送られ、ド
クター28で層厚を規制され、一定量が感光体ドラム１と
接近する現像部に搬送され、トナーが感光体ドラム１上
の潜像に供給され現像が行われる。ドクター28で遮られ
た現像剤はドクター28の背面に沿って図において上右方
向に移動し、現像剤撹拌装置29,30により幅方向に分散
され、幅方向の濃度が均一化される。現像部で現像の完
了した現像剤はスリーブ21の回転に伴われて現像容器22
内に搬送され現像スリーブ内磁石の一部に設けられた磁
性板の作用で現像スリーブ21の周囲より離れて落下し、
パドルホイール23の回転により現像容器22内に戻され、
図中に矢印で示される経路を循環する。現像を重ねるこ
とによってトナーが消費され、現像剤のトナー濃度が低
下すると、トナータンク26よりトナーが補給され、現像
剤のトナー濃度は常に所定の範囲に維持される。The second developing unit 20 has the same structure as a general developing device for two-component developer, faces the photosensitive drum 1 with a predetermined developing gap, has a magnet (not shown) therein, and is rotatable in the direction of the arrow. A developing sleeve 21 and a paddle wheel 23 rotatably provided near the bottom of the developing container 22 on the opposite side of the developing sleeve 21 from the photosensitive drum 1.
In the developer storage space 24 around the paddle wheel 23,
A two-component developer 25 composed of black toner and a carrier is filled, and a toner tank 26 is connected to the developing container 22. At the outlet of the toner tank 26, a toner replenishing roller 27 having a plurality of axially extending grooves is attached. On the upstream side of the developing position on the container wall around the developing sleeve 21, a doctor 28 for regulating the layer thickness of the developer conveyed by the developing sleeve 21 is provided, and behind the paddle wheel 23 is a diagonally upper portion. Fins 29 arranged in the direction
And a stirring screw 30 are provided. An entrance seal 31 is provided at a position where the periphery of the photosensitive drum 1 enters the developing section. During development, when the developing sleeve 21 and the paddle wheel 23 simultaneously rotate in the counterclockwise direction, the developer 25 stored in the developing container 22 is sent onto the developing sleeve 21 by the blades of the paddle wheel 23, and the layer thickness is adjusted by the doctor 28. The toner is supplied to the latent image on the photoconductor drum 1 to be developed, where a fixed amount of the toner is conveyed to the developing unit that approaches the photoconductor drum 1. The developer shielded by the doctor 28 moves in the upper right direction in the figure along the back surface of the doctor 28, and is dispersed in the width direction by the developer stirring devices 29 and 30, so that the concentration in the width direction is made uniform. The developer whose development has been completed in the developing section is accompanied by the rotation of the sleeve 21 and the developing container 22.
The magnetic plate provided in a part of the magnet in the developing sleeve is conveyed inside and drops away from the periphery of the developing sleeve 21,
By the rotation of the paddle wheel 23, it is returned to the inside of the developing container 22,
It circulates in the route indicated by the arrow in the figure. When the toner is consumed by the repeated development and the toner concentration of the developer decreases, the toner is replenished from the toner tank 26, and the toner concentration of the developer is always maintained within a predetermined range.
普通の黒色複写を行うとき、特に大量に継続して行う
ときは第２現像ユニット20を用いて行うことにより高速
現像を行うことができる。When ordinary black copying is performed, especially when a large amount is continuously performed, high-speed development can be performed by using the second developing unit 20.
第２現像ユニット20による黒色現像の後カラー現像を
行うときはパドルホイール33を停止する。これにより現
像スリーブ21上の現像剤が現像容器22内に落ち黒色現像
ができなくなる。そこで第１現像ユニット10の所定の色
の現像剤室の補給ローラ17が現像スリーブ12に対向する
位置に現像剤収納部13を回転し切換えて前記の如くして
現像作動する。When performing color development after black development by the second development unit 20, the paddle wheel 33 is stopped. As a result, the developer on the developing sleeve 21 falls into the developing container 22 and black development cannot be performed. Therefore, the developer accommodating portion 13 is rotated and switched to a position where the replenishing roller 17 of the developer chamber of a predetermined color of the first developing unit 10 faces the developing sleeve 12, and the developing operation is performed as described above.
有彩色現像間の色変えの場合は第１現像ユニット10の
現像剤収納部13の回転により切換を行なう。In the case of color change between chromatic color development, switching is performed by rotating the developer storage portion 13 of the first developing unit 10.
色変えを頻繁に行なう中に黒色現像が含まれている場
合には現像剤収納部13の中に一成分系黒色現像剤を収納
しておけば他の有彩色と同様にして第１現像ユニットの
みで色変え現像ができる。If black development is included during frequent color change, the first developing unit can be used in the same manner as other chromatic colors if the one-component black developer is stored in the developer storage portion 13. Color change development can be done only by itself.
効果 本発明により多色の現像剤を１つの現像ユニットに収
容できるので多色の色換え現像が可能でありながら小型
でコンパクトな構造の現像ユニットとすることができ
た。このコンパクトな現像ユニットの外に普通の二成分
黒色現像剤用現像ユニットを並置することにより多量に
複写する黒色コピーの場合の現像の高速化を維持するこ
とが可能になった。Effect According to the present invention, since a multicolor developer can be accommodated in one developing unit, it is possible to provide a developing unit having a small size and a compact structure, while being capable of multicolor color conversion development. By arranging an ordinary two-component black developer developing unit in parallel with this compact developing unit, it is possible to maintain high-speed development in the case of a black copy in which a large number of copies are made.
第１図は本発明に係る現像装置の概略説明図である。 １……感光体ドラム（静電潜像担持体） 10……一成分系現像ユニット 20……二成分系現像ユニット 12,21……現像スリーブ FIG. 1 is a schematic explanatory view of a developing device according to the present invention. 1 ... Photosensitive drum (electrostatic latent image carrier) 10 ... One-component developing unit 20 ... Two-component developing unit 12, 21 ... Developing sleeve
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高橋 道男 東京都大田区中馬込１丁目３番６号 株式 会社リコー内 (72)発明者 池末 真澄 東京都大田区中馬込１丁目３番６号 株式 会社リコー内 (56)参考文献 特開 昭51−11456（ＪＰ，Ａ) 実開 昭53−49439（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Michio Takahashi 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (72) Inventor Masumi Ikesue 1-3-6 Nakamagome, Ota-ku, Tokyo Ricoh Co., Ltd. (56) References Japanese Patent Laid-Open No. 51-11456 (JP, A) Actual No. 53-49439 (JP, U)
Claims (1)
剤を収容した複数の現像ユニットを配置し、該現像ユニ
ットの１つが黒色現像剤を収容した黒色現像ユニット、
他の現像ユニットが複数の異なる色の現像剤を収容した
複数色現像ユニットとして構成されたマルチカラー画像
形成装置において、 前記複数色現像のユニットが、異なる色の現像剤を収容
した複数の現像剤室と、前記静電潜像担持体に対向配置
された１つの現像スリーブと、前記現像剤室の現像剤を
該現像スリーブに補給し、かつ現像スリーブ側に補給し
た現像剤を現像剤室に回収する補給・回収手段とを有
し、該補給・回収手段が現像剤室毎に設けられているこ
とを特徴とするマルチカラー画像形成装置。1. A black developing unit in which a plurality of developing units containing developers of different colors are arranged adjacent to an electrostatic latent image carrier, and one of the developing units contains a black developer,
In a multi-color image forming apparatus in which another developing unit is configured as a multi-color developing unit accommodating a plurality of developers of different colors, the multi-color developing unit includes a plurality of developers accommodating developers of different colors. Chamber, one developing sleeve opposed to the electrostatic latent image carrier, the developer in the developer chamber is replenished to the developing sleeve, and the developer supplied to the developing sleeve side is supplied to the developer chamber. A multi-color image forming apparatus, comprising: a replenishment / recovery means for retrieving, the replenishment / recovery means being provided for each developer chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60188584A JPH0827562B2 (en) | 1985-08-29 | 1985-08-29 | Multi-color image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60188584A JPH0827562B2 (en) | 1985-08-29 | 1985-08-29 | Multi-color image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6249377A JPS6249377A (en) | 1987-03-04 |
| JPH0827562B2 true JPH0827562B2 (en) | 1996-03-21 |
Family
ID=16226228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60188584A Expired - Fee Related JPH0827562B2 (en) | 1985-08-29 | 1985-08-29 | Multi-color image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0827562B2 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07120103B2 (en) * | 1986-09-30 | 1995-12-20 | 株式会社東芝 | Development device |
| US7024138B2 (en) | 2003-02-28 | 2006-04-04 | Canon Kabushiki Kaisha | Image forming apparatus, and replenishing developer kit |
| US8634756B2 (en) | 2009-11-13 | 2014-01-21 | Eastman Kodak Company | Resource error correction in a multicolor electrophotographic print-engine |
| US8559831B2 (en) | 2009-11-13 | 2013-10-15 | Eastman Kodak Company | Sheet registration for a multipass electrophotographic printer |
| US8306461B2 (en) * | 2009-11-13 | 2012-11-06 | Eastman Kodak Company | Multicolor electrophotographic print engine |
| US8554089B2 (en) | 2009-11-13 | 2013-10-08 | Eastman Kodak Company | Job error correction in a multicolor electrophotographic print engine |
| US8652741B2 (en) | 2011-01-31 | 2014-02-18 | Eastman Kodak Company | Enhancement of discharged area developed toner layer |
| US8652740B2 (en) | 2011-01-31 | 2014-02-18 | Eastman Kodak Company | Balancing discharge area developed and transferred toner |
| US8431313B2 (en) | 2011-01-31 | 2013-04-30 | Eastman Kodak Company | Balancing charge area developed and transferred toner |
| US8693906B2 (en) | 2011-03-31 | 2014-04-08 | Eastman Kodak Company | Dual toner printing with charge area development |
| US8676074B2 (en) | 2011-03-31 | 2014-03-18 | Eastman Kodak Company | Method for providing ratio modulated printing with discharge area development |
| US8676072B2 (en) | 2011-03-31 | 2014-03-18 | Eastman Kodak Company | Ratio modulated printing with charge area development |
| US8693907B2 (en) | 2011-03-31 | 2014-04-08 | Eastman Kodak Company | Dual toner printing with discharge area development |
| US8805251B2 (en) | 2012-04-24 | 2014-08-12 | Eastman Kodak Company | Multi-toner charged area development method |
| US8805220B2 (en) | 2012-04-24 | 2014-08-12 | Eastman Kodak Company | Printer with multi-toner discharged area development |
| US8811864B2 (en) | 2012-04-24 | 2014-08-19 | Eastman Kodak Company | Printer with multi-toner charged area development |
| US8774659B2 (en) | 2012-04-24 | 2014-07-08 | Eastman Kodak Company | Multi-toner discharged area development method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5926954B2 (en) * | 1974-07-19 | 1984-07-02 | キヤノン株式会社 | multicolor electrophotographic device |
| JPS5545386Y2 (en) * | 1976-09-30 | 1980-10-24 |
-
1985
- 1985-08-29 JP JP60188584A patent/JPH0827562B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6249377A (en) | 1987-03-04 |
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